Revert to changeset 4c45dbd81a32 to fix mochitest-chrome orange.
am Ramasubramanian <sriram@mozilla.com>
# Date 1363299281 25200
# Node ID 8a1125546d125b3fd42a0603146856194bfb74e3
# Parent  6bbd7ce8308e4aeaeca73b2540f557bab3905681
Bug 848719: No Tail delegation needed for Menu button. [r=mfinkle]

--HG--
extra : rebase_source : ac72b0d0412f956f1327433b86f48e6404943163
Bug 848719: TabsButton will have curve only one side. [r=mfinkle] [needs-clobber]

--HG--
extra : rebase_source : 815c210eb08dbe17801fd951822a0b3908ed96a6